Example 11 - Chapter 8 Class 10 Introduction to Trignometry
Last updated at May 29, 2018 by Teachoo
Transcript
Example 11 Express cot 85° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°. cot 85° + cos75° = cot (90° − 5) + cos (90° − 15°) = tan 5° + sin 15° Hence required value is tan 5° + sin 15°
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